S8 THK NAL'TILUS. 



In 1S84 De Gregorio proposed the name FuadeUn for a nhell, 

 with the hinge as in Malleus; structure of the shell and inequality 

 of the valves as in Ontrea; cardinal line straight, and a wing as 

 in Aviculn, shell gaping on one side; external aspect of the 

 summits as in Aaoniid; interior as in Ostrea. Type F. lioyl ^ 

 n. sp., 25 mm., in a sponge from the abyssal zone of the medi- 

 terranean, off Tunis. E. von Martens, who compiled the mol- 

 lusca in the Zoo). Record for 1884, in commenting on the 

 species says: "photograph, not very clear figure, much re- 

 sembles the young state of Malleus regula (Forsk.) from the 

 Red Sea.'' Fischer in his Manuel makes Fiuidelln a section of 

 Malleus, with the following diagnosis: anterior ear obsolete, and 

 with a longitudinal, median ridge on the interior of the valves; 

 giving as the type, M. randeana-s d'Orbigny. Did Fischer con- 

 sider De Gregorio's species to be the same as d'Orbigny's? I 

 am inclined to think he did. From the description and figures 

 I see no characters to separate them. Orbigny looked upon it 

 as a deformed Avicula (Pteria), with the characteristics of that 

 genus when young and of Malleus when in the adult stage. Dr. 

 Dall under Electroma Stoliczka, (type Avicula smaragdina Reeve) 

 says: "The latter {Electroma) may be represented in the recent 

 fauna of the Antilles by Avwula candeana Orb., which seems to 

 owe its characters to comrnensalism with sponges." 



FuNDELLA CANDEANA (d'Orbigny). 



Avicula candeana d'Orb. Hist, de Cuba, La Sagra, Moll. II, 

 343, pi. 28, figs. 25-27, 1853. 



Malleus vesicvlatus Reeve, Conch. Icon. {Malleus) XI, pi. 3. 

 fig. 12, 1858. 



Malleus rufipunctatus Reeve, Conch. Icon., XI, pi. 3, fig. 8, 

 1858. 



Fundella lioyl De Gregorio, Bull. Soc. Mai. Ital.. X, 73, pi. 

 4, tig. 6, 1884. 



Malleus candeanus Fischer, Manuel de Conch., p. 954, 1887. 



Electroma (?) candeana Dall., Trans. Wagner Free Inst. Sci., 

 Ill, pt. 4, p. 668, 1898. 



The shell in question was removed from a coralline growth 

 and is greatly deformed as so many of the species of this group 



